The High Pi is the Alumni Advisor and the Chancellor of the chapter, and the key liaison connecting the undergraduate chapter, the alumni association, and the General Fraternity. These men have served Omicron Zeta in this important capacity:
- 2018– Jason J. Cho ’98
- 2017 Alexander W. Aidun '08
- 2015–17 Kosta Elefter '09
- 2013–15 Benjamin Z. Figoten '10
- 2012–13 Matthew H. Leighton ’08
- 2010–12 Jeffrey Barber '08 (frater in urbe)
- 2008–10 David B. Cronheim '07
- 2005–08 John F. Zelenka '03
- 2003–05 Eric R. Langstedt '01
- 1999–2003 Trevor B. Connor '95
- 1997–99 Eric R. Schneider '91
- 1995–97 Lloyd F. Kinnear III '86
- 1993–95 Brianno D. Coller '91
- 1991–93 T. Scot Brown '81
- 1973–91 Francis H. Schaefer, Jr. '29
- 1971–73 vacant
- 1969–71 Kenneth Himmel '58 (frater in urbe)
- 1966–68 Rev. S. George “Doc” Dirghalli '50 (frater in urbe)
- 1964–66 Jack Fisher '56 (frater in facultate)
- 1947–64 Rowland W. Leiby '21 (frater in facultate)
- 1945–46 Edward F. Hall '24 (frater in urbe)
- 1945 George Frank '11 (frater in urbe)
- 1943–44 war hiatus
- 1939–42 Francis H. Schaefer, Jr. '29
- 1934–39 Ed Hall '24 (frater in urbe)
- 1933–34 unknown
- 1930–32 Charles Ennis '19
- 1929 Charles Habicht '30
- 1928 Sam Segar '28
- 1926–27 Clyde Harrison
- 1925–26 John Levick '25
- 1924–25 Milburn Hollengreen '08
- 1923–24 unknown
- 1922–23 Christopher T. Morrow '23 (last undergraduate High Pi)
- 1921–22 Edward F. Hall '24
- 1920–21 unknown
- 1919–20 James Caron '20
- 1918–19 war hiatus
- 1917–18 George Cross '19
- 1916–17 Charles Lynch '17
- 1915–16 George Shultz '16
- 1914–15 Rod Rodriguez '15
- 1913–14 George Robinson '14